The classical economic term for Greece's situation is "boned." But one problem contributing to the country's ongoing collapse is that millions of residents underreport their incomes or just flat-out don't pay income taxes.

In fact, the underreporting situation there is so absurd that economist Herakles Polemarchakis used it as a chance to hammer away on the proliferation of Cayennes in the country. "A couple of years ago, there were more Cayennes circulating in Greece than individuals who declared and paid taxes on an annual income of more than €50,000, a figure only slightly above the vehicle's list price," Polemarchakis wrote in a recent Economics Research Institute bulletin.